2768-02-7 Usage
Description
Vinyltrimethoxysilane (VTMS) is a silane coupling agent characterized by its silicon and hydroxyl groups. It is primarily utilized to enhance the wettability and improve the superhydrophobic characteristics of various composites. VTMS is also used as a polymer modifier through grafting reactions, where the resulting pendant trimethoxysilyl groups serve as moisture-activated crosslinking sites. The silane-grafted polymer is processed as a thermoplastic, and crosslinking occurs after the fabrication of the finished article upon exposure to moisture. VTMS is a colorless transparent liquid.
Uses
Used in Coating Industries:
Vinyltrimethoxysilane is used as a surface modifier for materials such as TiO2, talc, kaolin, magnesium oxide nanoparticles, ammonium phosphate, and PEDOT. It provides superhydrophobicity by capping the material and creating a water-resistant protective layer, making it suitable for major coating industries.
Used in Polymer Preparation:
VTMS is used as a co-monomer in the preparation of different polymers, such as polyethylene or acrylics. These polymers exhibit improved adhesion to inorganic surfaces and can be crosslinked with moisture, enhancing their performance in various applications.
Used in Moisture-Curing Polymers:
Vinyltrimethoxysilane is used in the preparation of moisture-curing polymers, like polyethylene. Silane crosslinked polyethylene is widely utilized as cable isolation and sheathing, particularly in low voltage applications, as well as for hot water/sanitary pipes and underfloor heating systems.
Used as an Adhesion Promoter:
VTMS serves as an efficient adhesion promoter for various mineral-filled polymers, enhancing their mechanical and electrical properties, especially after exposure to moisture.
Used in Filler Compatibility:
Vinyltrimethoxysilane improves the compatibility of fillers with polymers, leading to better dispersibility, reduced melt viscosity, and easier processing of filled plastics.
Used in Surface Pre-Treatment:
VTMS is used for pre-treating glass, metals, or ceramic surfaces to improve the adhesion of coatings on these surfaces and enhance their corrosion resistance.
Used as a Moisture Scavenger:
Vinyltrimethoxysilane acts as a moisture scavenger, reacting rapidly with water. This property is widely utilized in the formulation of sealants.
Flammability and Explosibility
Flammable
Check Digit Verification of cas no
The CAS Registry Mumber 2768-02-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,7,6 and 8 respectively; the second part has 2 digits, 0 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 2768-02:
(6*2)+(5*7)+(4*6)+(3*8)+(2*0)+(1*2)=97
97 % 10 = 7
So 2768-02-7 is a valid CAS Registry Number.
InChI:InChI=1/C5H12O3Si/c1-5-9(6-2,7-3)8-4/h5H,1H2,2-4H3
2768-02-7Relevant articles and documents
Anti-Markovnikov addition of 2-mercaptobenzoxazole and 2-mercaptobenzothiazole to trimethoxy(vinyl)silane under solvent- and catalyst-free conditions
Bolgova, Yu. I.,Emel'yanov, A. I.,Grebneva, E. A.,Pavlov, D. V.,Pozdnyakov, A. S.,Trofimova, O. M.,Vakul'skaya, T. I.
, (2020)
The addition of 2-mercaptobenzoxazole or 2-mercaptobenzothiazole to trimethoxy(vinyl)silane was studied. The thiol-ene reaction leads to previously unknown carbofunctional (trimethoxysilyl)ethyl derivatives of 2-mercaptobenzazoles C6H4N(Y)CS(CH2)2Si(OMe)3 (Y = O, S) with anti-Markovnikov orientation. The proposed mechanism is confirmed by EPR spectroscopy and quantum chemical calculations.
Synthesis of a multifunctional alkoxysiloxane oligomer
Yoshikawa, Masashi,Wakabayashi, Ryutaro,Tamai, Misa,Kuroda, Kazuyuki
supporting information, p. 5362 - 5368 (2014/12/11)
An alkoxysiloxane oligomer (1, SiMe[OSi(CHCH2)(OMe)2][OSi(CH2)3Cl(OMe)2]2), containing vinyl and chloropropyl groups, was synthesized as a precursor for sol-gel synthesis. Di-tert-butoxymethylhydroxysilane (t-BuO)2MeSiOH was reacted with (MeO)2(CH2CH)SiCl to form (t-BuO)2MeSiOSi(CHCH2)(OMe)2 which was further alkoxysilylated with Cl(CH2)3SiCl(OMe)2 to form 1. The 1H, 13C, 29Si NMR and HR-MS data confirmed the formation of 1, indicating the successful synthesis of an alkoxysiloxane oligomer possessing different kinds of functional groups by a chemoselective route. Hydrolysis of 1 under acidic conditions was completed in a few hours. The solution state 29Si NMR spectra of samples hydrolyzed and condensed at various reaction times show no signals due to species generated by the cleavage of the siloxane bonds in 1, indicating the validity of the synthesized substance as a precursor for the formation of hybrids with homogeneously distributed functional groups. Intramolecular condensation of 1 to form cyclic trisiloxane units proceeds more preferentially than intermolecular condensation.
METHOD OF PRODUCING A HYDROLYZABLE SILICON-CONTAINING COMPOUND
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Page/Page column 17; 20, (2012/07/14)
The present invention provides a safe, inexpensive, and high yield means of producing a hydrolyzable silicon-containing compound, e.g., an organooxysilane and the like. A compound (A) represented by the general formula R1-O-R2 wherein R1 represents a C4-30, substituted or unsubstituted, tertiary alkyl group or aralkyl group and R2 represents a C1-30, substituted or unsubstituted, monovalent hydrocarbyl group or acyl group, is reacted in the presence of a Lewis acid catalyst with a halosilane (B) represented by the general formula R3mSiX4-m wherein R3 represents the hydrogen atom or a C1-30 substituted or unsubstituted monovalent hydrocarbyl group, X is independently bromine or chlorine, and m represents an integer from 0 to 3.